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External email server vs port forwarding/vpn
(sh.itjust.works)
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this post was submitted on 29 Jan 2024
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I've setup my email via a VPN to my own server.
This gives the advantage that your outgoing email always comes from the VPS ip address (pick a VPS provider that is trusted) and when your line is down, incoming email is cached on your VPS. It's a tad of double work, but pretty secure. Even connecting to my employer to work from home is not a big issue. (and that connection is limited to it's own vlan)
Also, with this method, you can route the mail into your network via port 26 when 25 is blocked or even set an outgoing vpn to your VPS and route the email that way. You'll be provider independent at home. (I even have a private ipv6 /48 via a tunnel broker)
You'll need to work a lot on your knowledge though, without DNSSEC, SPF, DKIM and DMARC the big 2 (Google and hotmail) will refuse your email.